Why inner transition elements have coloured ions?

1.	Why inner transition elements have coloured ions?
Answer» Answer: The reason why TRANSITION metal in particular are colorful is because they have unfilled or either half filled d orbitals. There is Crystal field theory which EXPLAINS the splitting of the d orbital, which SPLITS the d orbital to a higher and LOWER orbital. Now, the electrons of the transition metal can "jump".

Answer»

Answer:

The reason why TRANSITION metal in particular are colorful is because they have unfilled or either half filled d orbitals. There is Crystal field theory which EXPLAINS the splitting of the d orbital, which SPLITS the d orbital to a higher and LOWER orbital. Now, the electrons of the transition metal can "jump".

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Why inner transition elements have coloured ions?

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